71911 ACB/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 ACB/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.34 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3442 lbf
Radial static load rating
3442 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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71911 ACB/HCP4ADT Bearing Product Overview & Core Advantages
The 71911 ACB/HCP4ADT is a precision angular contact ball bearing supplied as a duplex tandem (DT) matched set. Engineered for high-speed operation and exceptional rigidity, this bearing is preloaded and designed to handle significant axial loads in one direction. Its construction with a phenolic cage and ceramic balls contributes to its superior performance in demanding applications requiring high accuracy and reliability.
71911 ACB/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACB | Angular Contact Bearing, 25° contact angle. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings). |
| P4A | High precision tolerance class (superior to ABEC 7). |
| DT | Duplex Tandem arrangement. Two bearings are matched to increase axial load capacity in the same direction. |
71911 ACB/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem (DT) arrangement and 25° contact angle provide high system rigidity and are optimized for handling heavy axial loads in one direction.
- Superior High-Speed Performance: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, enabling a high limiting speed of 34,000 rpm.
- Extended Service Life: The hybrid ceramic design offers increased durability, reduced wear, and the capability to run with less lubrication compared to all-steel bearings.
- Precision Operation: The P4A tolerance class ensures minimal runout and vibration, which is critical for applications demanding extreme rotational accuracy.
71911 ACB/HCP4ADT Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace & Defense Systems
- Other equipment requiring high-speed, high-precision, and high rigidity.
